Vacuum-UV-photolysis of aqueous solutions of citric and gallic acids

Autores
Quici, Natalia; Litter, Marta Irene; Braun, André M.; Oliveros, Esther
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The vacuum-UV- (VUV-) photolysis of water is one of the Advanced Oxidation Processes (AOP) based on the production of hydroxyl  radicals (HO·) that can be applied to the degradation of organic pollutants in aqueous systems. The kinetics of the VUV-photolyses of aqueous solutions of citric acid (1) or gallic acid (2) were investigated in the presence or absence of dissolved molecular oxygen (O2) and under different pH conditions. In the case of 1, the rate of consumption of the substrate was faster at pH 3.4 than in alkaline solution (pH 11), whereas, in the case of 2, the variation of pH (2.5 to 7.5) did not affect the course of the reaction. Unexpectedly, the rates of depletion of both 1 and 2 decreased in the absence of O2, this effect being much more pronounced in the case of 2. In order to explain these results, possible reaction pathways for the degradation of 1 and 2 are proposed, and the roles of the oxidizing (HO·) and reducing (H· and e-aq) species produced by the VUV-photolysis of water are discussed.
Fil: Quici, Natalia. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Litter, Marta Irene. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Braun, André M.. Karlsruher Institut für Technologie; Alemania
Fil: Oliveros, Esther. Karlsruher Institut für Technologie; Alemania
Materia
VUV- PHOTOLYSIS
AOP
CITRIC ACID
GALLIC ACID
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/244055
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/244055
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Vacuum-UV-photolysis of aqueous solutions of citric and gallic acidsQuici, NataliaLitter, Marta IreneBraun, André M.Oliveros, EstherVUV- PHOTOLYSISAOPCITRIC ACIDGALLIC ACIDhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The vacuum-UV- (VUV-) photolysis of water is one of the Advanced Oxidation Processes (AOP) based on the production of hydroxyl  radicals (HO·) that can be applied to the degradation of organic pollutants in aqueous systems. The kinetics of the VUV-photolyses of aqueous solutions of citric acid (1) or gallic acid (2) were investigated in the presence or absence of dissolved molecular oxygen (O2) and under different pH conditions. In the case of 1, the rate of consumption of the substrate was faster at pH 3.4 than in alkaline solution (pH 11), whereas, in the case of 2, the variation of pH (2.5 to 7.5) did not affect the course of the reaction. Unexpectedly, the rates of depletion of both 1 and 2 decreased in the absence of O2, this effect being much more pronounced in the case of 2. In order to explain these results, possible reaction pathways for the degradation of 1 and 2 are proposed, and the roles of the oxidizing (HO·) and reducing (H· and e-aq) species produced by the VUV-photolysis of water are discussed.Fil: Quici, Natalia. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Litter, Marta Irene. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Braun, André M.. Karlsruher Institut für Technologie; AlemaniaFil: Oliveros, Esther. Karlsruher Institut für Technologie; AlemaniaElsevier Science SA2008-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/244055Quici, Natalia; Litter, Marta Irene; Braun, André M.; Oliveros, Esther; Vacuum-UV-photolysis of aqueous solutions of citric and gallic acids; Elsevier Science SA; Journal of Photochemistry and Photobiology A: Chemistry; 197; 2-3; 6-2008; 306-3121010-6030CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1010603008000257info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jphotochem.2008.01.008info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:47:49Zoai:ri.conicet.gov.ar:11336/244055instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:47:49.517CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Vacuum-UV-photolysis of aqueous solutions of citric and gallic acids
title Vacuum-UV-photolysis of aqueous solutions of citric and gallic acids
spellingShingle Vacuum-UV-photolysis of aqueous solutions of citric and gallic acids
Quici, Natalia
VUV- PHOTOLYSIS
AOP
CITRIC ACID
GALLIC ACID
title_short Vacuum-UV-photolysis of aqueous solutions of citric and gallic acids
title_full Vacuum-UV-photolysis of aqueous solutions of citric and gallic acids
title_fullStr Vacuum-UV-photolysis of aqueous solutions of citric and gallic acids
title_full_unstemmed Vacuum-UV-photolysis of aqueous solutions of citric and gallic acids
title_sort Vacuum-UV-photolysis of aqueous solutions of citric and gallic acids
dc.creator.none.fl_str_mv Quici, Natalia
Litter, Marta Irene
Braun, André M.
Oliveros, Esther
author Quici, Natalia
author_facet Quici, Natalia
Litter, Marta Irene
Braun, André M.
Oliveros, Esther
author_role author
author2 Litter, Marta Irene
Braun, André M.
Oliveros, Esther
author2_role author
author
author
dc.subject.none.fl_str_mv VUV- PHOTOLYSIS
AOP
CITRIC ACID
GALLIC ACID
topic VUV- PHOTOLYSIS
AOP
CITRIC ACID
GALLIC ACID
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The vacuum-UV- (VUV-) photolysis of water is one of the Advanced Oxidation Processes (AOP) based on the production of hydroxyl  radicals (HO·) that can be applied to the degradation of organic pollutants in aqueous systems. The kinetics of the VUV-photolyses of aqueous solutions of citric acid (1) or gallic acid (2) were investigated in the presence or absence of dissolved molecular oxygen (O2) and under different pH conditions. In the case of 1, the rate of consumption of the substrate was faster at pH 3.4 than in alkaline solution (pH 11), whereas, in the case of 2, the variation of pH (2.5 to 7.5) did not affect the course of the reaction. Unexpectedly, the rates of depletion of both 1 and 2 decreased in the absence of O2, this effect being much more pronounced in the case of 2. In order to explain these results, possible reaction pathways for the degradation of 1 and 2 are proposed, and the roles of the oxidizing (HO·) and reducing (H· and e-aq) species produced by the VUV-photolysis of water are discussed.
Fil: Quici, Natalia. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Litter, Marta Irene. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Braun, André M.. Karlsruher Institut für Technologie; Alemania
Fil: Oliveros, Esther. Karlsruher Institut für Technologie; Alemania
description The vacuum-UV- (VUV-) photolysis of water is one of the Advanced Oxidation Processes (AOP) based on the production of hydroxyl  radicals (HO·) that can be applied to the degradation of organic pollutants in aqueous systems. The kinetics of the VUV-photolyses of aqueous solutions of citric acid (1) or gallic acid (2) were investigated in the presence or absence of dissolved molecular oxygen (O2) and under different pH conditions. In the case of 1, the rate of consumption of the substrate was faster at pH 3.4 than in alkaline solution (pH 11), whereas, in the case of 2, the variation of pH (2.5 to 7.5) did not affect the course of the reaction. Unexpectedly, the rates of depletion of both 1 and 2 decreased in the absence of O2, this effect being much more pronounced in the case of 2. In order to explain these results, possible reaction pathways for the degradation of 1 and 2 are proposed, and the roles of the oxidizing (HO·) and reducing (H· and e-aq) species produced by the VUV-photolysis of water are discussed.
publishDate 2008
dc.date.none.fl_str_mv 2008-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/244055
Quici, Natalia; Litter, Marta Irene; Braun, André M.; Oliveros, Esther; Vacuum-UV-photolysis of aqueous solutions of citric and gallic acids; Elsevier Science SA; Journal of Photochemistry and Photobiology A: Chemistry; 197; 2-3; 6-2008; 306-312
1010-6030
CONICET Digital
CONICET
url http://hdl.handle.net/11336/244055
identifier_str_mv Quici, Natalia; Litter, Marta Irene; Braun, André M.; Oliveros, Esther; Vacuum-UV-photolysis of aqueous solutions of citric and gallic acids; Elsevier Science SA; Journal of Photochemistry and Photobiology A: Chemistry; 197; 2-3; 6-2008; 306-312
1010-6030
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1010603008000257
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jphotochem.2008.01.008
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science SA
publisher.none.fl_str_mv Elsevier Science SA
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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